Home / 628,685.20-943,255.96-388,519.20

Finding the Fourth Proportional to 628,685.20, 943,255.96 and 388,519.20

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Solution

The fourth proportional to 628,685.20, 943,255.96 and 388,519.20 is: 582,919.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,685.20 : 943,255.96 = 388,519.20 : x
  2. Step 2: Convert to fraction form
    628,685.20/943,255.96 = 388,519.20/x
  3. Step 3: Cross multiply
    628,685.20x = 943,255.96 × 388,519.20
  4. Step 4: Simplify right side
    628,685.20x = 366,473,050,974.43
  5. Step 5: Solve for x
    x = 366,473,050,974.43/628,685.20
  6. Step 6: Final answer
    x = 582,919.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.